Measurements of the Production Cross Sections of Tritium from Oxygen Using p-Be and p-Li Neutrons up to En = 38 MeV
Measurements of the Production Cross Sections of Tritium from Oxygen Using p-Be and p-Li Neutrons up to En = 38 MeV
复制标题
使用 p-Be 和 p-Li 中子测量从氧气中产生氚的截面，最高 En = 38 MeV
DOI：
10.1524/ract.1996.75.1.1
复制
发表时间：
1996
期刊：
影响因子：
--
通讯作者：
N. Nogawa
中科院分区：
文献类型：
--
作者：
S. Shibata;T. Shibata;M. Imamura;T. Ohkubo;S. Satoh;Y. Uwamino;N. Morikawa;N. Nogawa
在安装在东京大学核研究所(INS)聚焦扇形(SF)回旋加速器的p-Be和p-Li中子场中，测量了氧产生氚的截面。用Be(p，n)B反应产生的半单能中子和Li(p，n)Be反应产生的质子能量分别为20-40 MeV和5-MeV、质子强度为2-5μΑ的半单能中子进行辐照，在样品辐照位置产生10-10n/cm/s的中子通量密度。中子能谱用NE-213型闪烁计数器测量。用蒸馏法提取作为氧靶的水中产生的氚，并用液体闪烁计数器测量。用p-Be和p-Li中子测量的0(n，t)N反应的激发函数在实验不确定度范围内符合得很好。将所得结果与文献中出现的(n，t)截面随靶原子序数变化的一般趋势进行了比较。
The production cross sections of tritium from oxygen have been measured in p-Be and p-Li neutron fields installed at the sectorfocusing (SF) cyclotron of the Institute for Nuclear Study (INS), University of Tokyo. Irradiations were performed with the semi-monoenergetic neutrons produced from the Be(p,n)B reaction at proton energies from 20 up to 40 MeV in 2.5-MeV steps, and those from Li(p,n)Be in 5-MeV steps with proton intensities of 2—5 μΑ, which yields neutron flux densities from 10 to 10 n/cm/sec at the position of sample irradiation. The neutron energy spectra were determined by an NE-213 scintillation counter. The tritium produced in the water used as the oxygen target was extracted by a distillation method, and measured by a liquid scintillation counter. The excitation functions for the 0(n,t)N reaction, measured by the p-Be and p-Li neutrons, agreed well with each other within the experimental uncertainties. The obtained results have been compared with the general trend in the (n,t) cross sections as a function of the atomic number of the target appearing in the literature.